0     0
5000 0.049940
10000 0.541151
20000 0.778391
40000 0.892970
80000 0.948308
160000 0.975034
320000 0.987942
640000 0.994177
1280000 0.997187
2560000 0.998642
5120000 0.999344
10240000 1